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    <title>Document</title>
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<body>
    <script>
        // 1.两数和
        function getSum(num1, num2) {
            console.log(num1 + num2);
        }
        getSum(1, 50);

        // 2.累加和
        function getAllSum(num1, num2) {
            var sum = 0
            for (var i = num1; i <= num2; i++) {
                sum += i;
            }
            console.log(sum)
        }
        getAllSum(1, 50)
    </script>
</body>

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